Apparatus for cleaning press cylinders



July 27,1937. S GEGENHEIMER 2,088,512

APPARATUS FOR CLEANING PRESS CYLINDERS Filed Aug. 26, 1956 i6 A oRNgY.

Patented July 27, 1937 UNITED STAT PATENT oFFrcr.

APPARATUS FOR CLEANING PRESS CYLIN- DERS Claims.

This invention relates to apparatus for cleaning cylinders, having particular reference to cylinders of offset or other printing presses.

The present invention relates to that type of cylinder cleaning apparatus disclosed by Patent No. 1,623,723 to Gegenheimer and Barney, and includes certain improvements to obviate objections present in the patented construction.

An objection to the patented structure is that when the operative end of the cleaner blade wears away, the degree of angularity between the blade and the cylinder is changed, whereby contact of a sharp edge of the blade with the cylin- .der is prevented. The present improvement remedies this condition in that it provides for a particular mounting of the blade so as to insure at all times a proper or desirable angularity between the blade and the cylinder regardless of any deformity in the blade edge. The invention 20 further includes improved means whereby the angularity of the blade may be minutely regulated or adjusted to secure the most satisfactory results.

With these objects in view, together with others which will appear as the description proceeds the invention consists in the novel construction, combination and arrangement of parts, all as will be described more fully hereinafter, illustrated in the drawing and particularly pointed out in the claims.

In the drawing:

Figure 1 is an end elevation of a conventional arrangement of press cylinders and illustrating in cross section the application thereto of a cylinder cleaner embodying the invention,

Figure 2 is a fragmentary front elevation of the cleaner, and

Figure 3 is an enlarged detailed sectional view showing the manner in which the blade bar is 40 mounted in its supports.

In the present drawing, the ink distributing drum or cylinder is indicated at 4, while the rollers 5 contact or cooperate therewith in a manner Well understood and fully described in the patent aforesaid. The invention involves means of an improved manner whereby the drum or cylinder 4 may be scraped clean of the ink film carried thereby when occasion demands, and includes the arrangement hereinafter fully set forth.

Spaced in advance of the drum 6 and near the ends thereof are supporting brackets or arms 6 capable of swinging toward or away from the drum, and the blade bar I is supported by these brackets parallel to the axis of the cylinder 4 and in such manner as to be movable in a direction toward or from the cylinder periphery.

The arms or brackets 6 each rotatably support a trunnion 8 having a supporting block 9 at its inner end, the said trunnions being held in the arms against rotation by set screws or other locking means I0. Each supporting block is provided with a flat upper face indicated'at II and upon which rests the ends of the blade bar 1. These blade bar ends are maintained in fixed relation to the supporting blocks and yet adjustable therein by means of screws I2 threaded in a head I3 or other rigid part of the supporting blocks. Each end of the blade bar is equipped with an upstanding yoke or bearing member It rotatably receiving the shank of screw or bolt l2; the latter being provided with spaced collars or shoulders I5 engaging the ends of yoke M. A knurled head l6 upon the forward end of each screw or bolt enables the latter to be readily manipulated by hand.

The bar which extends the full length of the cylinder is provided with a scraper blade I! adapted to contact at its free end with the face of the cylinder.

The proper angular position of the blade with respect to the cylinder having been determined, the set screws ID are tightened so that this angularity is maintained. When it is desired to scrape the cylinder, the brackets are swung in the direction of the latter until the blade makes contact with the cylinder, whereupon rotation of the latter causes the surface to be scraped and the ink therefrom deposited in trough l8 carried by brackets l9 depending from the blade bar. As adjustment of the blade becomes necessary, due to wear by frictional contact, the angularity of the blade need not be disturbed as such adjustment is carried out by operation of the knurled heads carried by the screws I2. By this arrangement it is apparent that a keen or sharp scraping edge in the blade end is maintained in proper relationship with the cylinder face without altering the angular position of the blade.

Having thus described my invention, what I claim is:

1. A cleaner for press cylinders, comprising brackets adjacent ,to the cylinder, supports carried by said brackets, a blade bar resting at its ends on said supports, cooperating means on the supports and ends for moving the bar toward or away from the cylinder, and a blade carried by said bar.

2. A cleaner for press cylinders, comprising brackets adjacent to the cylinder and movable toward or away from the latter, supports carried by said brackets, a blade bar resting at its ends'on said supports, cooperating means on the supports and ends for moving the bar toward or away from the cylinder, and a blade carried by said bar.

3. A cleaner for press cylinders, comprising brackets adjacent to said cylinder, supports rotatably held in said brackets, means for holding said supports to said brackets, a blade bar resting at its ends on said supports, cooperating means on said supports and ends for moving the bar toward or away from said cylinder, and a blade carried by said supports.

4: A cleaner for press cylinders, comprising a pair of brackets, a supporting block carried by each bracket, a blade bar having its ends resting on said blocks, a screw on each block disposed laterally thereof, each screw engaging the adjacent bar end for moving the latter relative to the supporting blocks, and a blade carried by said bar.

5. A cleaner for press cylinders, comprising a bracket arranged adjacent to each end of the cylinder, a trunnion rotatably carried by each bracket, means for securing said trunnions against rotation, a supporting block on each trunnion, a screw in each block disposed in the direction of said cylinder, a blade bar having its ends engaged in said blocks, a yoke on each of said ends embracing the adjacent screw, and spaced shoulders on said screw engaging opposite sides of said yokes.

WILLIAM GEGENHEIMER. 

